The human leukocyte antigen system (HLA) is the name of the major histocompatibility complex (MHC) in humans. The superlocus contains a large number of genes related to immune system function in humans. This group of genes resides on chromosome 6, and encodes cell-surface antigen-presenting proteins and many other genes. The HLA genes are the human versions of the MHC genes that are found in most vertebrates (and thus are the most studied of the MHC genes). The proteins encoded by certain genes are also known as antigens, as a result of their historic discovery as factors in organ transplantations. The major HLA antigens are essential elements for immune function. Different classes have different functions: HLA class I antigens (A, B & C) present peptides from inside the cell (including viral peptides if present). These peptides are produced from digested proteins that are broken down in the proteasomes. The peptides are generally small polymers, about 9 amino acids in length. Foreign antigens attract killer T-cells (also called CD8 positive- or cytotoxic T-cells) that destroy cells.

Catalog #

H6098-23

HLA class II antigens (DP,DM, DOA,DOB,DQ, & DR) present antigens from outside of the cell to T-lymphocytes. These particular antigens stimulate T-helper cells to multiply, and these T-helper cells then stimulate antibody-producing B-cells to produce Antibodies to that specific antigen. Self-antigens are suppressed by suppressor T-cells.

HLA class III antigens encode components of the complement system.HLA have other roles. They are important in disease defense. They may be the cause of organ transplant rejections. They may protect against or fail to protect (if down regulated by an infection) cancers. They may mediate autoimmune disease (examples

type I diabetes, coeliac disease). Also, in reproduction, HLA may be related to the individual smell of people and may be involved in mate selection. Aside from the genes encoding the 6 major antigens, there are a large number of other genes, many involved in immune function, located on the HLA complex. Diversity of HLA in human population is one aspect of disease defense, and, as a result, the chance of two unrelated individuals having identical HLA molecules on all loci is very low. Historically, HLA genes were identified as a result of the ability to successfully transplant organs between HLA similar individuals.

Applications

This antibody has not been tested in methodologies other than Microcytotoxicity Test. Potential applications include Flow Cytometry, Cell Typing, Tissue Staining and Chimerism Studies.

Recommended Dilution

Cytotoxicity: Add 0.9ml of PBS, 1% BSA to 100ul of10X stock solution.

Optimal dilutions to be determined by the researcher.

Source

Ascites fluid

Storage and Stability

Lyophilized powder may be stored at 4°C for short-term only. Reconstitute to nominal volume by adding sterile 40-50% glycerol and store at -20°C. Reconstituted product is stable for 12 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.

Please contact United States Biological for bulk requirements and licensing requests relating to production applications.

Clone Type

Monoclonal

Isotype

IgM

Clone No

4i88

Host

Mouse

Source

Human

Concentration

Not Determined

Form

Supplied as a lyophilized powder in PBS, 1% BSA. Reconstitute to 100ul sterile dH2O to make a 10X stock solution.

Purity

Ascites

Immunogen

HLA Class 1 Antigen-A9, A25, A32.

Specificity

Reacts to HLA Class 1 Antigen-A9,A25,A32. Specificity was determined at a 1:10 dilution by the microcytotoxicity test under standard NIH conditions.

Important Note

This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.